Don't Buy It!
Have you ever considered using those automated link building services like Yext? They promise to build your identity across the web and provide backlinks for your business.
Don't buy it!
These services claim to improve your standing in online search engines actually inhibit your ranking, sometimes dramatically.
These companies are "one-way" service providers. They do not correct listings that are incorrect. They just add more listings. Then, if you decide you don't want to pay for their service anymore they will remove all the listings they set up for you.
Here's the big problem. Search engines are looking for consistency. If you want to have your business recognized by Google, then your information needs to be listed exactly the same - across all business listing sites - online. Not just close to the same - exactly the same. The only way to make sure this happens, and that incorrect information is deleted, is to do it by hand.
So next time you get a solicitation from Yahoo, Merchant Circle, Yodle, etc. pass it by. Set up and correct your business listing yourself - or pay someone to do it for you. Don't buy a service. Not only will you be wasting your money. You will be hurting your search engine results!